RF/EMC: definitely. It's an intentional radiator (WiFi) and an unintentional radiator (high-frequency CPU). Using pre-certified COTS modules helps with this quite a bit because they'll, hopefully, pass on their own but they do not relieve you of the certification burden.
Safety: from a legal perspective I don't believe safety certification is mandatory because it runs on low voltage. The wall wart would need to be certified. But... from a liability perspective it might still be necessary. If one of these devices were to catch fire and burn someone's house down the company is going to get sued. Maybe sued by the homeowner, maybe sued by the homeowner's insurance company. The counter to that is to have solid product liability insurance and the insurer may have specific safety certification requirements before they'll even issue an insurance contract, and they may have additional safety certification options that would reduce the premiums.
RF/EMC: definitely. It's an intentional radiator (WiFi) and an unintentional radiator (high-frequency CPU). Using pre-certified COTS modules helps with this quite a bit because they'll, hopefully, pass on their own but they do not relieve you of the certification burden.
Safety: from a legal perspective I don't believe safety certification is mandatory because it runs on low voltage. The wall wart would need to be certified. But... from a liability perspective it might still be necessary. If one of these devices were to catch fire and burn someone's house down the company is going to get sued. Maybe sued by the homeowner, maybe sued by the homeowner's insurance company. The counter to that is to have solid product liability insurance and the insurer may have specific safety certification requirements before they'll even issue an insurance contract, and they may have additional safety certification options that would reduce the premiums.